Serotonin Transporter Availability in Early Stage Parkinson’s Disease and Multiple System Atrophy

Table 1

Demographic and clinical characteristics.

	PD (𝑛=50)	MSA (𝑛=7)	𝑃 value
Age-of-onset (mean ± SD), yr	54.4±9.7	56.7±14.7	0.70
Male sex-no. (%)	31 (62.0)	4 (57.1)	0.81
Total followup (mean ± SD), yr	14.2±3.7	6.0±3.9	<0.005
Most affected side (striatal) (right/left)	22/28	3/4	0.96
Disease duration at imaging (mean ± SD), yr	1.2±1.8	0.2±0.14	<0.005
UPDRS motor score at imaging (0–108) (mean ± SD)	19.0±6.2	20.4±5.6	0.56

PD: Parkinson’s disease, MSA: multiple system atrophy, SD: standard deviation, and UPDRS: unified parkinson’s disease rating scale.